let

Apply a transform
Restrict scope
Idiomatic 'if not null'
Map nullable value if not null

data class Data( val value: Int?) 


fun getFromDatabase() : Data? { 
  ...
}


fun getValue() : BigDecimal { 
  return getFromDatabase()?.let { 
    it.toBigDecimal()
  } ?: BigDecimal.ZERO
}

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